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Models 278610 and 278620 six-dial decade resistance boxes allow quick and easy setting of a wide range of resistance. 

These resistance boxes are used in combina­tion with voltage or current standards to adjust voltage or current, as dummy load resistances or as an arm of AC bridges.

1 - 2 of 2 Part Numbers
278610
278610
  • Resistance - 0.1 to 111,111 Ohms (Six Decade Dials)
278620
278620
  • Resistance - 1 to 1,11,110 Ohms (Six Decade Dials)
1 - 2 of 2 Part Numbers

Specifications

Accuracy

  • ± 0.05 to ± 2 at 23 ± 3° C Ambient Temperature

Current

  • 1.7 mA (100 kiloohms) - Rating Current
  • 5.5 mA to 2.2 A - Current Rating And, Max.
  • 7.1 mA (10 to 30 kiloohms) - Max.

Humidity

  • 25 to 80 % Relative Humidity

Input

  • 0.5 w/ Step - Max.
  • 250 V (40 to 100 kiloohms) - Max.
  • 5 W - for Overall Instrument: Max.

Insulation Resistance

  • More Than 500 megaohms at 500 Vdc

Operating Temperature

  • 0° to 40° C (32° to 104° F)

Power

  • 0.3 w/ Step - Rating
  • 3 W - for Overall Instrument

Rating

  • 250 V (200 kiloohms to 1 Megaohm) - Rating

Resistance

  • < 23 milliohms - Residual Resistance
  • 0.1 to 100 kiloohms - Step
  • 0.1 to 111,111 ohms (Six Decade Dials) - 278610
  • 1 to 1,111,110 ohms (Six Decade Dials) - 278620

Storage Temperature

  • -10° to 50° C (14° to 122° F)

Supply Voltage

  • 1,500 Vac for One Minute - Dielectric Strength
  • 250 V - Max.
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